package day1;

import org.junit.Test;

public class Demo {
	@Test
	public void test() {
		// syst:trace
		System.out.println("HelloWorld.test()");
		int a = 10;
		int b = 20;
		int num = a * b + ++a + --b - b++ + a--;//200+11+19-19+11=222
		System.out.println(num);
	}
	
	
	@Test
	public void test1() {
		
	}
}
